Y⃒̸̷̝̜̙ͥͥͥngmar<p>Smoke alarm (optical) from <a href="https://social.tchncs.de/tags/AliExpress" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AliExpress</span></a> failed the smoke test. It feeps loudly when pushing the test button, but when held into some nice fire smoke, it does exactly nothing, despite patience.</p><p>So always test with a real life scenario. The test button only checks the batteries and the beeper are working, not the actual sensor.</p><p>I sent them a nice video and expect a refund. This isn't because it's from China, the same can happen with any.</p><p><a href="https://social.tchncs.de/tags/SmokeAlarm" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SmokeAlarm</span></a> <a href="https://social.tchncs.de/tags/FireAlarm" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FireAlarm</span></a> <a href="https://social.tchncs.de/tags/Detector" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Detector</span></a> <a href="https://social.tchncs.de/tags/Safety" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Safety</span></a> <a href="https://social.tchncs.de/tags/Fire" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Fire</span></a> <a href="https://social.tchncs.de/tags/DIY" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DIY</span></a></p>